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The field of Galactic archaeology is currently undergoing a revolution largely thanks to a new generation of ambitious stellar surveys as APOGEE, GALAH, SkyMapper and Gaia, producing copious amounts of high quality, complementary data. Galactic chemical evolution plays an important role in the interpretation and understanding of this expanding body of data, with the ultimate goal of probing the mechanisms of galaxy formation. I will present an overview of my work involving age determination using a full Bayesian framework of isochrones fitting, accounting for initial metallicity rather than present-day surface metallicity. Using this method with Gaia parallaxes, I derive ages for the second data release of the GALAH survey. I will present the reconstructed temporal evolution of elements such as Na,Mg,Al,Si,K,Ca,Sc,Ti,Cr,Fe,Ni,Cu,Ba and many more, and the implication of these trends in the context of chemical evolution and Galactic formation. I have further adapted this framework into deriving photometric stellar parameters for the SkyMapper Survey, with the aim of tracing past merger events in the Galactic halo and unfolding the assembly history of the Milky Way. |
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